gistfile1.scala

package net.experimentalworks.scala
import edu.kit.ipd.sonar.server._
import edu.kit.ipd.sonar.server.centralities.CentralityImpl
import edu.kit.ipd.sonar.server.centralities.Centrality
import scala.collection.JavaConversions._
import scala.collection.mutable.Map
import java.util.{HashMap => JavaHashMap}

/**
 * Indegree calculations done in Scala.
 *
 * @author David Soria Parra <david.parra@student.kit..edu>
 */
class IndegreeCentrality extends CentralityImpl {
    def getWeight(g : edu.kit.ipd.sonar.server.Graph) : JavaHashMap[Annotable, java.lang.Double]= {
        if (g == null)
            throw new IllegalArgumentException("Graph is null")
        val res = new JavaHashMap[Annotable, java.lang.Double]()
        g.getNodeList.values.foreach(
            (n : Node) => res.put(n, g.getEdgeList().filter(
                (e : Edge) => e.isIncomingEdge(n)).size))
        res 
    }

    override def getType = Centrality.Type.NodeCentrality
    override def getRequiredAPIVersion = 0
    override def getVersion = 1
    override def getName = "Indegree (Scala)"
}